This is a PCB wtih 4 Layers Electronic Printed Circuit Board 1.6mm HASL LF White Soldmask Black silkscreen
More Detials for this 4 Layers Electronic Printed Circuit Board 1.6mm HASL LF White Soldmask Black silkscreen
More photoes for this 4 Layers Electronic Printed Circuit Board 1.6mm HASL LF White Soldmask Black silkscreen